DeckGLMap takes the full viewport

[HansKallekleiv]

The component does not honor its parent size.
E.g. in the python example if the height is reduced:

wcc.Frame(
    style={"flex": 10, "height": "40vh"},
    children=[map_obj],
),

The resulting render is truncated:

This seems to be a well known issue with DeckGL and is solvable by setting the nearest parent position to relative.
https://stackoverflow.com/questions/60881824/how-to-prevent-deck-gl-layers-from-occupying-entire-viewport